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Derivative expansion and renormalisation group flows
We study the convergence of the derivative expansion for flow equations. The convergence strongly depends on the choice for the infrared regularisation. Based on the structure of the flow, we explain why optimised regulators lead to better physical predictions. This is applied to O(N)-symmetric real...
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| Lenguaje: | eng |
| Publicado: |
2001
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| Acceso en línea: | https://dx.doi.org/10.1088/1126-6708/2001/11/059 http://cds.cern.ch/record/527342 |